Glide symmetry of iron-based superconductors: Electronic structure and superconductivity

The alternating positioning of As/Se atoms above and below the Fe plane is known to alter the in-plane translational symmetry of Fe-based high-temperature superconductors, into a glide symmetry: translation followed by z-inversion. The proper descriptions of this symmetry and its consequences on the electronic structure and superconductivity have become a focus of recent intense theoretical studies [1-3]. In this talk, we will explicitly incorporate the glide symmetry in our first-principles studies of electronic structure, and discuss its consequence in superconductivity and other correlation in this class of materials. [1] Chia-Hui Lin, et al., Phys. Rev. Lett. 107, 257001 (2011). [2] Jiangping Hu and Ningning Hao, Phys. Rev. X 2, 021009 (2012). [3] M. Khodas and A. V. Chubukov, Phys. Rev. Lett. 108, 247003 (2012).